George w



(No Model) I G. W. WAITT'.

ORE SCREEN.

Patented Sept. 19, 1882.

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GEORGE W. WAITT, OF CAMDEN, NEW JERSEY.

OiRiE-SCREEN.

SPECIFICATION formingpart of Letters Iatent No. 264,585, dated September19, 1882.

- Application filed October 17,1881. (Nomodeh) Q In all whom it mayconcern:

Be itkuown that I, GEORGE W. WAITT, of Camden, in the county of Camden,State of New Jersey, have invented a new and useful, lmprovement inOre-Screens, of which the following is a specification.

My invention relates to an improved orescreen, such as is used instamp-batteries and other devices and machines in-which pulverized oreis subjected to a screening operation, and will be understood ashereinafter set forth and claimed.

The accompanying drawings form a part of this specification andillustrate the invention. I

Figure 1 is a plan view of a screen. I Fig. 2 is a side view of one ofthescre'en plates or bars, showing the holes through which thebinding-rods pass. Fig. 3' is a sectional view of a series ofscreen-bars having A-shaped heads. Fig. 4 shows a side View andtransverse section' of one of the spacing-washers. Fig. 5 shows one ofthe binding-rods and nuts. Fig. 6 shows a number of bars havingdiffereutly-shaped heads, but all broadened. Fig. 7 is an elevation ofone side of a screen, showing it completely equipped.

Similar letters of reference indicate corresponding parts in all thefigures.

A shows the screen plates or bars. They are provided with broadenedheads, as shown, and near each end have a hole formed in the body toreceive the rods R, on which they are strung. Spacing-washers R, formed,as shown in Fig. 4, with a flat space on top, are interposed betweeneach pair of plates. The rods R pass through these washers also, and ateither end the rods are screw-threaded and provided with atightening-nut, N, which, when screwed up,

' bind the bars andspacing-washers securely together. The broadenedheads of my bars A are formedof the same width the entire lengths ofthe" bars, and the bars are so mounted that jthespaces betweeutheinshall be the same.

This wayof mounting bars is the usual one; butT-headed'bars heretoforein use have had the heads tapered, being broader at one end than at theother, and consequently the spaces between them varied in width from oneend to the other. V-shaped bars have also been set up in this way, sothat the spaces shall be broader at one end than at the other.

In ore-screens it is necessary that the bars retain their exactpositions, and I am not aware that separately-formed broad-headed barshave been mounted to attain this end, combined with equidistant spacing.

Several forms of broad-headed bars, a, b, c, and d, are shown in Fig. 6.

Having thus describedmy invention, what I desire to secure by LettersPatent is-- The screen herein described, consisting of broad-headedbars, the heads whereof are of the same width from end to end, incombination with thesupporting-bars, separating-washers, and tighteningnuts and screws, substan tially as set forth, whereby the said bars aremounted to maintain a uniform distance apart across the screen.

In testimony that I claim the foregoing I have hereto set my hand this7th day of October, A. D. 1881.

GEORGE WAITT.

. Witnesses CHARLES F. JONES, I. S. BACON.

